Meet Our Technical Advisors

David Brown is a global public health consultant focused on providing assistance and technical support in the evaluation and monitoring of population health outcomes. Prior to founding Brown Consulting Group International, LLC in 2015, he served as epidemiologist-in-residence and advisor on evidence and information for immunization services at the United Nations Children’s Fund (UNICEF). For six years he led UNICEF’s technical contribution in inter-agency work to improve the availability, timeliness, completeness, accuracy and use of data within immunization programmes. Prior to joining UNICEF, he focused on epidemiologic and health services research to further the understanding of the effects of adverse childhood experiences across the life-course as a public health problem as well as that of common and novel risk factors for non-communicable diseases (particularly cardiovascular disease) both within the United States and globally while working for the US Centers for Disease Control and Prevention and the World Health Organization.

In October 2015, David was selected to serve a 3-year term as a member of the World Health Organization’s Immunization Practices Advisory Committee which supports and advises on matters related to the review and/or formulation of immunization practices, operational standards, tools and technologies to strengthen and improve the delivery of immunization programmes at country level. 

Following completion of his undergraduate work in economics and engineering, David earned doctorate and master’s degrees in epidemiology and a master’s degree in natural resource and environmental economics. 

Dr. Heidi Larson is an anthropologist who currently leads a team studying issues around public trust in vaccines and the implications for immunization programs and policies. She is a senior lecturer affiliated with the Department of Infectious Disease Epidemiology and the Faculty of Epidemiology and Population Health at the London School of Hygiene & Tropical Medicine. Dr. Larson previously headed Global Communication for Immunization at UNICEF and Chaired the Advocacy Task Force for the Global Alliance for Vaccines and Immunization (GAVI). Her research specializes in the analysis and evaluation of health and development programmes with particular attention to social and political factors which can affect policies and programmes. Her particular focus is on risk and rumour management in health programmes and technologies, especially vaccines - from clinical trials to delivery - and building public trust. Dr. Larson is also a Fellow at the Chatham House Centre on Global Health Security.

Dr. Daniel Feikin has been with the CDC for 15 years, where he spent 6 years with the Respiratory Diseases Branch focusing on bacterial pneumonia, particularly pneumococcus and Hib, in developing countries. From 2004-2010, he served as the Epidemiology Section Chief for the International Emerging Infections Program in Kenya. There, Dr. Feikin worked on surveillance establishing the burden and epidemiology of respiratory and diarrheal illness, was co-PI on a rotavirus vaccine study, and conducted a carriage survey of pneumococcus before and after vaccine introduction. Since 2010, Dr. Feikin has served as the Epidemiology Section head at the International Vaccine Access Center at Johns Hopkins School of Public Health, where he has focused on evaluations of childhood pneumonia etiology, serotype replacement after pneumococcal conjugate vaccine introduction, and demand side incentives to improving routine immunizations in Africa. Dr. Feikin did his clinic training in Internal Medicine at UCSF, received his MSPH at University of Colorado, and is a graduate of CDC's EIS program. 

Dr. Brendan Flannery is an epidemiologist with CDC’s Global Immunizations Division where he provides technical support to the World Health Organization and Ministries of Health globally to strengthen surveillance for invasive bacterial, vaccine-preventable diseases (Haemophilus influenzae, Streptococcus pneumoniae and Neisseria meningitidis) and assists national immunization programs with introduction of new vaccines. He has a PhD in Epidemiology and an MPH in Epidemiology and Biostatistics from the University of California Berkeley.  In his previous role at the CDC, he served as consultant to the Pan American Health Organization in Brazil and provided technical support to the National Immunizations Program of the Brazilian Ministry of Health. Dr. Flannery participated in CDC’s response to global emergencies including SARS and has analyzed impact of vaccination on racial disparities in pneumococcal disease in the US population.